add patch for Clang v9.0.1 to fix installation problem

[alexandermichels]

(created using eb --new-pr)

fixes #14998

[alexandermichels]

Patch to fix issue reported in #14998. Thank you to @branfosj for providing the solution!

[boegel]

@alexandermichels Please add a short description on top of the patch to describe what it does, why it's needed, and/or which errors it's fixing exactly.

Also mention author or add a reference to upstream fix.

Do take into account that this implies also changing the SHA256 checksums for this patch file

[branfosj]

Looking further through https://bugs.gentoo.org/708430 I think we want https://gitweb.gentoo.org/repo/gentoo.git/tree/sys-libs/compiler-rt-sanitizers/files/9.0.1/glibc-2.31.patch?id=2741567d6f7fb139c8ad37137fb581987a779e97

Just commenting out that check will be fine for newer glibc, but some will require it:

+/* glibc 2.30 and earlier provided 16-bit mode field instead of 32-bit
+   on many architectures.  */

That also looks close to the equivalent patch for GCC: https://github.com/easybuilders/easybuild-easyconfigs/blob/develop/easybuild/easyconfigs/g/GCCcore/GCCcore-9.2.0-fix-glibc-2.31-libsanitizer.patch

[alexandermichels]

@boegel I added a short description to the patch file.

@branfosj I can test out the patch you linked.

[boegel]

@boegelbot please test @ generoso
EB_ARGS="--installpath /tmp/pr15007"

[boegelbot]

@boegel: Request for testing this PR well received on login1

PR test command 'EB_PR=15007 EB_ARGS="--installpath /tmp/pr15007" EB_CONTAINER= /opt/software/slurm/bin/sbatch --job-name test_PR_15007 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 9870

Test results coming soon (I hope)...

Details

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[boegelbot]

Test report by @boegelbot
FAILED
Build succeeded for 0 out of 1 (1 easyconfigs in total)
cns1 - Linux Rocky Linux 8.5, x86_64, Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz (haswell), Python 3.6.8
See https://gist.github.com/cb4d6f4754787c34c12602ca9a505b22 for a full test report.

[Crivella]

closing this since GCCcore-8.3.0 is deprecated, see https://docs.easybuild.io/policies/toolchains.

Also the Clang easyblock has been superseded by the new LLVM one

• enhance LLVM easyblock for compilation of clang/flang + other llvm-projects easybuild-easyblocks#3373